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37 Cards in this Set
- Front
- Back
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What is energy? |
The power do to work |
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What are the energy forms? |
Nuclear, thermal, chemical, mechanical, electrical, electromagnetic, radiant, sound |
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What is chemical energy? |
Energy involving breaking and forming chemical bonds |
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What is thermal energy? |
Movement of molecules to create heat |
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What is nuclear energy? |
Released by atomic nuclei |
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What is mechanical energy? |
The energy of an object that is moving |
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What is radiant energy? |
Transfer of energy by light |
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What is sound energy? |
Vibrations that travel |
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What is electrical energy? |
Energy of moving electrons |
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What is electromagnetic energy? |
In electrical and magnetic fields |
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What is the scientific method? |
Purpose, research, hypothesis, experiment, analysis, and conclusion |
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What is quantitative? |
Using numbers |
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What is qualitative |
Describing |
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What is independent? |
The thing that changes, "x" |
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Dependent |
Result of independent, "y" |
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What is control group? |
The thing that you compare |
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What is "constant? |
The things that stay the same |
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What is potential energy? |
Stored energy |
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What is kinetic energy? |
Moving energy |
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What are the simple machines? |
Lever, wheel and axle, wedge, inclined plane, pulley, screw |
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What is a simple machine? |
Has few or no moving parts and it makes work easier |
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Does the effort length or the load length have to be farther away from the fulcrum to make the work easier? |
The effort length has to be farther away from the fulcrum |
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What are the 3 main functions of a simple machine? |
1. Change direction of force 2. Transmit force 3. Modify the intensity of the force |
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Direct? |
Fits together perfectly. Ex.: Lego |
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Indirect? |
Something attached with a screw or other things |
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Removable? |
Can be removed. Ex.: A pen and its cap |
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Non-Removable? |
Can't be removed |
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Rigid? |
Has no elastics or springs |
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Elastic? |
Has elastics or springs |
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Complete? |
Moves as one things, together |
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Partial? |
If one part moves, the other parts don't. Ex.: Scissors, or a door |
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Examples of mechanisms that are transmission of motion? |
Chain and sprocket, belt and puller, gears, friction wheels, pulley |
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Examples of mechanisms that are transformation of motion? |
Connecting rod and crank, cam and follower, rack and pinion, screw and nut |
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Guiding rotation? |
This allows the part to rotate only (circular or oscillatory). This kind of guiding controls generally uses cylindrical parts. (Paper towel rack) |
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Guiding Translation? |
This allows the part to move only in a straight line (straight or alternating). Generally uses parts in the shape of a rectangular prism (Desk drawer) |
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What is conduction? |
Heat transferred through direct contact |
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What is convection? |
Heat transferred through gas or liquid |
